PlaySudoku.us
Expert · Puzzle #32
6
9
2
1
5
4
8
6
2
8
1
4
9
2
8
1
9
7
3
8
2
1
5
6
The hardest published Sudoku puzzle — graded by the number of search nodes a computer needs — was named 'Al Escargot' by its creator.
The hardest published Sudoku puzzle — graded by the number of search nodes a computer needs — was named 'Al Escargot' by its creator.
"The threat is stronger than the execution." — Aaron Nimzowitsch
"The threat is stronger than the execution." — Aaron Nimzowitsch